Retaining-valve device.



W. V. TURNER.

RETAINING vALI/E DEVICE.

APPLICAT ON FILED DEC. 13, l9l6v 1 @99@ Patented Aug. 27, 1918.

INVENTOR Wm IterVTurher "WALTER V. TURNER, ill WILKINSBURG; EEIFTIQ'SYL A, ASSIGNOR TU THE WESTING- HQ'USE AIR BRAKE COll'IFANY, O1 PENNSYLVANIA, A CORPORATION 015 PENNSYL'VATJTIA.

RETAIIQ'ING IALVIE DEVICE.

1 276,9g 9 Spccificatic of'i Application filed December 1 3, 1916. Serial lilo. 138,609.

i k To all wlwm may concave:

Be it known that I, f. TURNER? a a citizen of the United States, residing; at Wilkinshurg, in the county of Allegheny" and 5 tate of Pennsylvania have invented and useful improvements in list Valve Devices, of which the follow ing specification. 4 c

This invention relates to fluid pressure brakes, and more part cularly toineans retaining fluid under in the brace cylinder.

It has heretofore been prop a retaining valve device ted t" l nected to the brake evil 1 in w tion of the triple valve device and of to restrict the exhaust the b der and to out of the ennan the brake cylinder pressuie nus tion for connecting the exhaust to the retaining valve device 5.

In operation, upon releasing the brakes after the brakes have been applied in the usual manner, it the cool: 9 is turned to the position for connecting the triple valve exhaust to the from the links cylinder flows slowly tln'cu h. the cl eke 8 into the reservoir 7.

' /Vhcn the reservoir 7 by 10 the pressure in flow from the cylinder increases to the w icli the ret icing valve device adjusted, fluid is exhausted at the revalve device so tl at the pressure in e voir the setting to employ o es "not rise above t the brake cylinder he consequent reduction in brake 1 pressure causes a hack flow of 351116.

2c to a predetermined (719,5 loin the reservoir '2' through the choke 8 to hold the hraip the brake cylinder, so that the pressureiary reservoirs in the llifi cylinder will be maintained for control of the t in Will a i oeviod and thus insure that the ularly when operating held applied until the brake The time 01" reeherge 01 vi iflicientlj] recharged to perervoirs, however, pai'ticulavi zipplic tion of the brakes. train, be such that the 3 events L18 too rapid educpressure may be t by er pressure by flow to the brake cylinder 1 T l erably of such size as A Jial T the same rateof flew cylinder as would be the case ce J 3 e emcee my invention, What 25 L ed desire secure by Letz'essure brake the combinai A e cylinder and a retaining "1 of a volume reservoir in- 49 valve device 1, u aunilia terposee between the brake cylinder and said brake cylinder 3, and a TJcalae pi retaining valve device. spondin with the usual auto aid 2. Ina Fluid pressure brake, the combipressure brake equipment. naticn with e brake cylinder, triple valve A retaining valve device i 7 evice and a retai, valve device connected 41-5 a pipe}; with exhaust poi 1" triple valve exhaust port, of a reservalve device 1 and-interposeo x. a constant volume interposed a reservoir 2'. in ci e between the triple valve device and the rereservoir 'Z and t valve device choke plug 8 and a tin a uild pressure brake, the combifi one positicn for on with brake cylinder, triple valve deezheust to theatnics and a retaining valve device connected retaining valve device 5, fluid.

'ectlv throu h the usual re- 51% trifle valve demg Viv a device and V ficmruumication from 10 vice to he reserveir. .lQlGOif hereunto set my V. TURNER. 

